Skip to content
Back of the Box Builds

Back of the Box Builds

LEGO Alternate Builds!

  • SETS
    • Adventurers
    • Aquazone
    • Belville
    • Building Set with People
    • Castle
    • Duplo
    • Fabuland
    • Harry Potter
    • Holiday and Event
    • LEGOLAND
    • Model Team
    • Pirates
    • Space
    • Star Wars
    • Technic
    • Town
    • Universal Building Set
    • Western
    • More Sets
    • Misc
  • USEFUL LINKS
    • Submit Instructions!
    • New Instructions
    • New Official Sets
    • New Alternate Builds
    • Minifigs
    • Very Small Builds
    • Small Builds
    • Medium Builds
    • Large Builds
    • Extra Large Builds
    • How BOTBB was Built
  • THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

Harry Potter

Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Small Builds 

4719 – Back A

March 22, 2025March 22, 2025 Master Builder 2454 Views

From: 4719: Quality Quidditch SuppliesName: TBDSubmitted by: USERInstructions:

Read more
Chamber of Secrets Harry Potter Harry Potter Sets Medium Builds Official Sets 

4719: Quality Quidditch Supplies

March 22, 2025March 22, 2025 Master Builder 4221 Views

Year Released: 2003BricklinkInstructions

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Small Alt Build Small Builds Sorcerer's Stone 

4702 – Back B

August 8, 2024August 8, 2024 Master Builder 2612 Views

From: 4702: The Final ChallengeName: Telescope Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Small Alt Build Small Builds Sorcerer's Stone 

4702 – Back A

August 8, 2024August 8, 2024 Master Builder 2567 Views

From: 4702: The Final ChallengeName: Catapult Practice Instructions: View PDF | Download .io File

Read more
Harry Potter Harry Potter Sets Official Sets Small Builds Sorcerer's Stone 

4702: The Final Challenge

August 8, 2024August 8, 2024 Master Builder 4548 Views

Year Released: 2001BricklinkInstructions

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Small Alt Build Small Builds Sorcerer's Stone 

4708 – Instructions A

August 1, 2024August 8, 2024 Master Builder 2682 Views

From: 4708: Hogwarts ExpressName: Wizard Car Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Large Alt Build Large Builds Sorcerer's Stone 

4708 – Back B

August 1, 2024August 8, 2024 Master Builder 2823 Views

From: 4708: Hogwarts ExpressName: Hogwarts Cargo Hauler Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Large Alt Build Large Builds Sorcerer's Stone 

4708 – Back C

August 1, 2024August 8, 2024 Master Builder 2724 Views

From: 4708: Hogwarts ExpressName: Potion Alley Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Large Alt Build Large Builds Sorcerer's Stone 

4708 – Back A

August 1, 2024August 8, 2024 Master Builder 2562 Views

From: 4708: Hogwarts ExpressName: Little Engine Instructions: View PDF | Download .io File

Read more
Box Plus Harry Potter Harry Potter Sets Official Sets Playscape/Play Stage Box Small Builds Sorcerer's Stone 

4723: Diagon Alley Shops

July 10, 2024October 8, 2024 Master Builder 4135 Views

Year Released: 2001BricklinkInstructions NONE 🙁

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Very Small Builds 

4720 – Back C

July 9, 2024July 9, 2024 Master Builder 2369 Views

From: 4720: Knockturn AlleyName: TBDSubmitted by: USERInstructions:

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Medium Builds 

4720 – Back B

July 9, 2024July 9, 2024 Master Builder 2527 Views

From: 4720: Knockturn AlleyName: TBDSubmitted by: USERInstructions:

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Medium Builds 

4720 – Back A

July 9, 2024July 9, 2024 Master Builder 2445 Views

From: 4720: Knockturn AlleyName: TBDSubmitted by: USERInstructions:

Read more
Chamber of Secrets Harry Potter Harry Potter Sets Medium Builds Official Sets 

4720: Knockturn Alley

July 9, 2024July 9, 2024 Master Builder 4177 Views

Year Released: 2003BricklinkInstructions

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4706 – Back B

June 12, 2024June 17, 2024 Master Builder 2653 Views

From: 4706: Forbidden CorridorName: Bridge Trap Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4706 – Back C

June 12, 2024June 17, 2024 Master Builder 2633 Views

From: 4706: Forbidden CorridorName: Treasure Tower Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4706 – Back A

June 12, 2024June 17, 2024 Master Builder 2784 Views

From: 4706: Forbidden CorridorName: A Deserted Chamber Instructions: View PDF | Download .io File

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Instructions Added Small Builds 

4735 – Back B

June 12, 2024June 17, 2024 Master Builder 2411 Views

From: 4735: SlytherinName: The Grumpy Dude Club Instructions: View PDF | Download .io File

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Instructions Added Small Builds 

4735 – Back A

June 12, 2024June 17, 2024 Master Builder 2617 Views

From: 4735: SlytherinName: Slytherin Secrets Instructions: View PDF | Download .io File

Read more
Alternate Builds Extra Large Builds Harry Potter Harry Potter Alternate Builds Instructions Added Sorcerer's Stone 

4709 – Back C

June 12, 2024June 17, 2024 Master Builder 2478 Views

From: 4709: Hogwarts CastleName: Gryffindor Tower Instructions: View PDF | Download .io File

Read more
Alternate Builds Extra Large Builds Harry Potter Harry Potter Alternate Builds Instructions Added Sorcerer's Stone 

4709 – Back B

June 12, 2024June 17, 2024 Master Builder 2674 Views

From: 4709: Hogwarts CastleName: The Boathouse Instructions: View PDF | Download .io File

Read more
Alternate Builds Extra Large Builds Harry Potter Harry Potter Alternate Builds Instructions Added Sorcerer's Stone 

4709 – Back A

June 12, 2024June 17, 2024 Master Builder 2591 Views

From: 4709: Hogwarts CastleName: Castle Rooms Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4705 – Back B

June 12, 2024June 17, 2024 Master Builder 3032 Views

From: 4705: Snape’s ClassName: Snape’s Laboratory Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4705 – Back A

June 12, 2024June 17, 2024 Master Builder 2758 Views

From: 4705: Snape’s ClassName: Falling Floor Tower Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4704 – Back B

May 28, 2024May 30, 2024 Master Builder 2808 Views

From: 4704: The Chamber of the Winged KeysName: Free Ron! Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4704 – Back A

May 28, 2024May 30, 2024 Master Builder 2827 Views

From: 4704: The Chamber of the Winged KeysName: High Stakes Jungle Gym Instructions: View PDF | Download .io File

Read more
Harry Potter Harry Potter Sets Medium Builds Official Sets Sorcerer's Stone 

4704: The Chamber of the Winged Keys

May 28, 2024May 28, 2024 Master Builder 4520 Views

Year Released: 2001BricklinkInstructions

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4707 – Back A

May 27, 2024May 30, 2024 Master Builder 2564 Views

From: 4707: Hagrid’s HutName: Telescope Tower Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4707 – Back C

May 26, 2024May 30, 2024 Master Builder 3009 Views

From: 4707: Hagrid’s HutName: A Wizard Windmill Instructions: View PDF | Download .io File

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4707 – Back B

May 26, 2024May 30, 2024 Master Builder 2712 Views

From: 4707: Hagrid’s HutName: A Wizard Campfire Instructions: View PDF | Download .io File

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Small Builds 

4730 – Back C

January 23, 2024 Master Builder 2414 Views

From: 4730: The Chamber of SecretsName: TBDSubmitted by: USERInstructions:

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Medium Builds 

4730 – Back B

January 23, 2024 Master Builder 2437 Views

From: 4730: The Chamber of SecretsName: TBDSubmitted by: USERInstructions:

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Medium Builds 

4730 – Back A

January 23, 2024January 23, 2024 Master Builder 2385 Views

From: 4730: The Chamber of SecretsName: TBDSubmitted by: USERInstructions:

Read more
Chamber of Secrets Extra Large Builds Harry Potter Harry Potter Sets Official Sets 

4730: The Chamber of Secrets

January 23, 2024January 23, 2024 Master Builder 4321 Views

Year Released: 2002BricklinkInstructions

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Very Small Builds 

4731 – Back A

January 23, 2024January 23, 2024 Master Builder 2429 Views

From: 4731: Dobby’s ReleaseName: TBDSubmitted by: USERInstructions:

Read more
Chamber of Secrets Harry Potter Harry Potter Sets Official Sets Small Builds 

4731: Dobby’s Release

January 23, 2024January 23, 2024 Master Builder 4107 Views

Year Released: 2002BricklinkInstructions

Read more
Alternate Builds Goblet of Fire Harry Potter Harry Potter Alternate Builds Large Builds 

4767 – Back A

May 16, 2023May 16, 2023 Master Builder 2793 Views

From: 4767: Harry and the Hungarian HorntailName: TBDSubmitted by: USERInstructions:

Read more
Goblet of Fire Harry Potter Harry Potter Sets Large Builds Official Sets 

4767: Harry and the Hungarian Horntail

May 16, 2023May 16, 2023 Master Builder 4127 Views

Year Released: 2005BricklinkInstructions

Read more
Alternate Builds Extra Large Builds Goblet of Fire Harry Potter Harry Potter Alternate Builds 

4768 – Back A

May 16, 2023May 16, 2023 Master Builder 2505 Views

From: 4768: The Durmstrang ShipName: TBDSubmitted by: USERInstructions:

Read more
Extra Large Builds Goblet of Fire Harry Potter Harry Potter Sets Official Sets 

4768: The Durmstrang Ship

May 16, 2023May 16, 2023 Master Builder 4694 Views

Year Released: 2005BricklinkInstructions

Read more
Alternate Builds Extra Large Builds Goblet of Fire Harry Potter Harry Potter Alternate Builds 

4766 – Back A

May 16, 2023May 16, 2023 Master Builder 2317 Views

From: 4766: Graveyard DuelName: TBDSubmitted by: USERInstructions:

Read more
Extra Large Builds Goblet of Fire Harry Potter Harry Potter Sets Official Sets 

4766: Graveyard Duel

May 16, 2023May 16, 2023 Master Builder 4058 Views

Year Released: 2005BricklinkInstructions

Read more
Alternate Builds Goblet of Fire Harry Potter Harry Potter Alternate Builds Medium Builds 

4762 – Back A

May 16, 2023May 16, 2023 Master Builder 2474 Views

From: 4762: Rescue from the MerpeopleName: TBDSubmitted by: USERInstructions:

Read more
Goblet of Fire Harry Potter Harry Potter Sets Medium Builds Official Sets 

4762: Rescue from the Merpeople

May 16, 2023May 16, 2023 Master Builder 4037 Views

Year Released: 2005BricklinkInstructions

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Prisoner of Azkaban Small Builds 

4751 – Back A

May 16, 2023May 16, 2023 Master Builder 2280 Views

From: 4751: Harry and the Marauder’s MapName: TBDSubmitted by: USERInstructions:

Read more
Harry Potter Harry Potter Sets Official Sets Prisoner of Azkaban Small Builds 

4751: Harry and the Marauder’s Map

May 16, 2023May 16, 2023 Master Builder 4336 Views

Year Released: 2004BricklinkInstructions

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Prisoner of Azkaban Very Small Builds 

4750 – Back A

May 16, 2023May 16, 2023 Master Builder 2143 Views

From: 4750: Draco’s Encounter with BuckbeakName: TBDSubmitted by: USERInstructions:

Read more
Harry Potter Harry Potter Sets Official Sets Prisoner of Azkaban Very Small Builds 

4750: Draco’s Encounter with Buckbeak

May 16, 2023May 16, 2023 Master Builder 4072 Views

Year Released: 2004BricklinkInstructions

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Small Builds 

4733 – Back B

March 3, 2023March 3, 2023 Master Builder 2337 Views

From: 4733: The Dueling ClubName: TBDSubmitted by: USERInstructions:

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Small Builds 

4733 – Back A

March 3, 2023March 3, 2023 Master Builder 2420 Views

From: 4733: The Dueling ClubName: TBDSubmitted by: USERInstructions:

Read more
Chamber of Secrets Harry Potter Harry Potter Sets Medium Builds Official Sets 

4733: The Dueling Club

March 3, 2023March 3, 2023 Master Builder 4607 Views

Year Released: 2002BricklinkInstructions

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Small Builds Sorcerer's Stone 

4714 – Back D

March 2, 2023March 2, 2023 Master Builder 2732 Views

From: 4714: Gringott’s BankName: TBDSubmitted by: USERInstructions:

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Small Builds Sorcerer's Stone 

4714 – Back C

March 2, 2023March 2, 2023 Master Builder 2265 Views

From: 4714: Gringott’s BankName: TBDSubmitted by: USERInstructions:

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Small Builds Sorcerer's Stone 

4714 – Back B

March 2, 2023March 2, 2023 Master Builder 2266 Views

From: 4714: Gringott’s BankName: TBDSubmitted by: USERInstructions:

Read more
Alternate Builds Harry Potter Harry Potter Alternate Builds Small Builds Sorcerer's Stone 

4714 – Back A

March 2, 2023March 2, 2023 Master Builder 2298 Views

From: 4714: Gringott’s BankName: TBDSubmitted by: USERInstructions:

Read more
Harry Potter Harry Potter Sets Medium Builds Official Sets Sorcerer's Stone 

4714: Gringott’s Bank

March 2, 2023March 2, 2023 Master Builder 4146 Views

Year Released: 2002BricklinkInstructions

Read more
Harry Potter Harry Potter Sets Large Builds Official Sets Sorcerer's Stone 

4706: Forbidden Corridor

February 27, 2023February 27, 2023 Master Builder 4280 Views

Year Released: 2001BricklinkInstructions

Read more
Chamber of Secrets Harry Potter Harry Potter Sets Official Sets Small Builds 

4735: Slytherin

February 27, 2023February 27, 2023 Master Builder 4109 Views

Year Released: 2002BricklinkInstructions

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Small Builds 

4726 – Back B

February 27, 2023February 27, 2023 Master Builder 2241 Views

From: 4726: Quidditch PracticeName: TBDSubmitted by: USERInstructions:

Read more
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Small Builds 

4726 – Back A

February 27, 2023February 27, 2023 Master Builder 2411 Views

From: 4726: Quidditch PracticeName: TBDSubmitted by: USERInstructions:

Read more
Chamber of Secrets Harry Potter Harry Potter Sets Medium Builds Official Sets 

4726: Quidditch Practice

February 27, 2023February 27, 2023 Master Builder 4065 Views

Year Released: 2002BricklinkInstructions

Read more
Harry Potter Harry Potter Sets Large Builds Official Sets Sorcerer's Stone 

4707: Hagrid’s Hut

December 29, 2021December 29, 2021 Master Builder 4144 Views

Year Released: 2001BricklinkInstructions

Read more
Harry Potter Harry Potter Sets Large Builds Official Sets Sorcerer's Stone 

4708: Hogwarts Express

July 13, 2021August 8, 2024 Master Builder 4612 Views

Year Released: 2001BricklinkInstructions

Read more
Extra Large Builds Harry Potter Harry Potter Sets Official Sets Sorcerer's Stone 

4709: Hogwarts Castle

April 16, 2021July 13, 2021 Master Builder 4889 Views

Year Released: 2001BricklinkInstructions

Read more
Harry Potter Harry Potter Sets Medium Builds Official Sets Sorcerer's Stone 

4705: Snape’s Class

April 16, 2021April 16, 2021 Master Builder 4410 Views

Year Released: 2001BricklinkInstructions

Read more

EXPLORE MORE OFFICIAL SETS

6444: Outback Airstrip
Classic Town Medium Builds Official Sets Outback Town Town Sets 

6444: Outback Airstrip

November 21, 2023November 21, 2023 Master Builder

Year Released: 1997BricklinkInstructions

6289: Red Beard Runner
Extra Large Builds Official Sets Pirates Pirates I Pirates Sets 

6289: Red Beard Runner

July 13, 2021July 13, 2021 Master Builder
6312: Straight Road Plates
Classic Town Official Sets Supplemental Town 

6312: Straight Road Plates

October 10, 2022October 10, 2022 Master Builder
6799: Showdown Canyon
Box Plus Cowboys Official Sets Playscape/Play Stage Box Small Builds Western Western Sets 

6799: Showdown Canyon

August 1, 2023October 8, 2024 Master Builder
1590-2: ANWB Breakdown Assistance
Classic Town Large Builds Official Sets Town Town Sets Traffic 

1590-2: ANWB Breakdown Assistance

October 22, 2021October 22, 2021 Master Builder
6592: Vacation Hideaway (Weekend Cottage)
Building Classic Town Official Sets Small Builds Town Town Sets 

6592: Vacation Hideaway (Weekend Cottage)

June 23, 2025June 23, 2025 Master Builder
6310: T-Road Plates
Classic Town Official Sets Supplemental Town 

6310: T-Road Plates

October 10, 2022May 5, 2025 Master Builder
5920: Island Racer
Adventurers Adventurers Sets Dino Island Official Sets Small Builds 

5920: Island Racer

July 26, 2020July 26, 2020 Master Builder
6878: Sub Orbital Guardian
ABCs Bjarne Tveskov Blacktron II Blacktron II Sets Official Sets Small Builds 

6878: Sub Orbital Guardian

October 4, 2019August 14, 2023 Master Builder
1682: Space Shuttle
Airport Classic Town Large Builds Official Sets Town Town Sets 

1682: Space Shuttle

February 27, 2023July 25, 2024 Master Builder
6088: Robber’s Retreat
Box Story Large Builds Ninja Ninja Alternate Builds Ninja Official Sets Official Sets 

6088: Robber’s Retreat

January 24, 2022April 3, 2024 Master Builder
6542: Launch & Load Seaport
Classic Town Extra Large Builds Harbor Official Sets Town Town Sets Wrecker 

6542: Launch & Load Seaport

August 1, 2022August 1, 2022 Master Builder
1731 (1711, Kabaya: Space 4): Ice Planet Scooter
Ice Planet 2002 Ice Planet 2002 Sets Jørn Thomsen Official Sets Space Very Small Builds 

1731 (1711, Kabaya: Space 4): Ice Planet Scooter

April 6, 2020March 10, 2025 Master Builder
6251: Pirate Mini Figures (Sea Mates)
Official Sets Pirates Pirates I Pirates Sets Very Small Builds 

6251: Pirate Mini Figures (Sea Mates)

April 9, 2020April 9, 2020 Master Builder
6355: Derby Trotter
Classic Town Medium Builds Official Sets Recreation Town Town Sets 

6355: Derby Trotter

December 28, 2021December 28, 2021 Master Builder
6340: Hook & Ladder
Classic Town Fire Medium Builds Official Sets Town Town Sets 

6340: Hook & Ladder

December 29, 2021December 29, 2021 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

Logo
There were once pictures of additional LEGO® builds on the back of set boxes. Written on the boxes was typically something about the endless building possibilities, "Build any of these exciting models with this set!" There were no instructions for these alternate builds, until now.

Sets

  • Adventurers
  • Aquazone
  • Belville
  • Building Set with People
  • Castle
  • Duplo
  • Fabuland
  • Harry Potter
  • Holiday and Event
  • LEGOLAND
  • Model Team
  • Pirates
  • Space
  • Star Wars
  • Technic
  • Town
  • Universal Building Set
  • Western
  • More Sets
  • Misc

Useful Links

  • Submit Instructions!
  • New Instructions
  • New Official Sets
  • New Alternate Builds
  • Minifigs
  • Very Small Builds (<35 pcs)
  • Small Builds (<100 pcs)
  • Medium Builds (<200 pcs)
  • Large Builds (<400 pcs)
  • Extra Large Builds (>400 pcs)
  • How BOTBB was Built

In Honor of 1526

The classic space set that never was.

Copyright © 2025 Back of the Box Builds. All rights reserved. LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize, or endorse this site.